On Mar 20, 2013, at 9:52 AM, Andras Farkas wrote:
Dear Pikal and Robert,
thanks for the help, I guess trying the if function is worth it, and
indeed, it works for the example I provided. Unfortunatelly though I
am not getting the expected results with my actual code, which is a
lot more complicated using R2OpenBUGS. Let me give you the actual
example:
using my model and input parameters I am generating res with a bugs
function:
res <-bugs(list(....)
and also have:
k <-5+2
I have tryed your code as follows:
if (e > 0) { res <-bugs(list(....); k <-5+2 }
my goal is that if e = 0, then not to prompt a call of the model in
OpenBUGS, which is what is happening currently with the way it is
written here. Any thoughts on how to completiley "ignorre" a that
line or chunk?
That code _should_ have the desired avoidance of a call to bugs(). Are
you perhaps dealing with a samll non-zero 'e' that prints as zero at
the console? Check Faq 7.31.
Also:
?all.equal
?zapsmall
--
David.
--- On Wed, 3/20/13, Robert Baer <rb...@atsu.edu> wrote:
From: Robert Baer <rb...@atsu.edu>
Subject: Re: [R] how to skip part of the code
To: "PIKAL Petr" <petr.pi...@precheza.cz>
Cc: "Andras Farkas" <motyoc...@yahoo.com>, "r-help@r-project.org" <r-help@r-project.org
>
Date: Wednesday, March 20, 2013, 9:27 AM
On 3/20/2013 8:21 AM, PIKAL Petr wrote:
Hi
-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-bounces@r-
project.org] On Behalf Of Andras Farkas
Sent: Wednesday, March 20, 2013 2:11 PM
To: r-help@r-project.org
Subject: [R] how to skip part of the code
Dear All,
another quick question, this one is on skipping part of my code,
so let
us say:
a <-5
b <-2
e <-0
d <-a+b
f <-a-b
what I would like to do is to have R NOT to calculate the value
for d
in case the value of e equals to zero (essentially skip that
"chunk"),
but instead move on to calculate te value for f. In the code I am
working with the value of e changes, and I would like to calculate d
and f at all times when the value of e is greater then zero. If
possible, I would like to do this without using the functions
"ifelse"
and "if else"
Why? This is exactly the reason for which if else was invented?
I am not sure if some simple solution without if is available.
if (e > 0) { d <- a+b; f <- a-b }
seems to be simple.
Regards
Petr
I second Petr on the question, why not use if? But this might meet
your
criteria.
a <- 5
b <- 2
e <- 0
#
dat <- data.frame(a, b, e)
dat$d[dat$e > 0] <- a + b
dat$f <- a - b
appreciate the help,
Andras
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--
Robert W. Baer, Ph.D.
Professor of Physiology
Kirksille College of Osteopathic Medicine
A. T. Still University of Health Sciences
Kirksville, MO 63501 USA
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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David Winsemius, MD
Alameda, CA, USA
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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